In the USO match Fed couldn't buy a serve, he was hovering below 50% for much of the match and Millman still barely beat him. Roger also used more drop shots in 1 night than he normally does in a year. Between the humidity and the lingering hand issue, he might as well have been a totally different player.
I expect a much more aggressive Federer on return, and one that doesn't need 15 points to close out a service game. First two rounds he's been pounding the corners from both wings off the baseline, which I expect to overwhelm Millman. John plays great defense in that he can run and outwork his opponents. But I don't think his defense is great at absorbing the kind of pace Federer provides when he's on. I don't expect to see much slicing from Fed. He'll look to strike quick and draw the error.
